I have trained a model using keras and saved to json file and .h5 weight file. Then I need to put this run on intel Neural Compute stick. So I converted these two model and weight files to .meta file for tensorflow using my repo: https://github.com/anuragcp/to_ncs_graph.git
Prediction working without NCS. On creating graph from this meta file using mvNCCompile command it make an error:
[Error 5] Toolkit Error: Stage Details Not Supported: VarHandleOp
I Have checked on both ncsdk v1 & v2 - same result.
Any idea how to solve this?
Related
I am training the maskrcnn inception v2 model on the Tensorflow version for further work with OpenVino. After training the model, I freeze the model using a script in object_detection_API directory:
python exporter_main_v2.py \
--trained_checkpoint_dir training
--output_directory inference_graph
--pipeline_config_path training/mask_rcnn_inception_resnet_v2_1024x1024_coco17_gpu-8.config
After this script, I get the saved model and pipeline files, which should be used in OpenVInO in the future
The following error occurs when uploading the received files to model optimizer:
Model Optimizer version:
2020-08-20 11:37:05.425293: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library cudart64_100.dll
[ FRAMEWORK ERROR ] Cannot load input model: TensorFlow cannot read the model file: "C:\Users\Anna\Downloads\inference_graph\inference_graph\saved_model\saved_model.pb" is incorrect TensorFlow model file.
The file should contain one of the following TensorFlow graphs:
frozen graph in text or binary format
inference graph for freezing with checkpoint (--input_checkpoint) in text or binary format
meta graph
Make sure that --input_model_is_text is provided for a model in text format. By default, a model is interpreted in binary format. Framework error details: Error parsing message.
For more information please refer to Model Optimizer FAQ (https://docs.openvinotoolkit.org/latest/_docs_MO_DG_prepare_model_Model_Optimizer_FAQ.html), question #43.
I teach the model by following the example from the link article, using my own dataset: https://gilberttanner.com/blog/train-a-mask-r-cnn-model-with-the-tensorflow-object-detection-api
On gpu, the model starts and works, but I need to get the converted model for OpenVINO
Run the mo_tf.py script with a path to the SavedModel directory:
python3 mo_tf.py --saved_model_dir <SAVED_MODEL_DIRECTORY>
I'm trying to determine if this Tensorflow Hub model can be converted to TFLITE format (and eventually compiled for the TPU/Coral Board), by doing something like this.
converter = tf.compat.v1.lite.TFLiteConverter.from_saved_model("./")
tflite_model = converter.convert()
However, I need to specify the model tag-sets and this command gives no results (in both TF 1.13.1 and 2.0):
% saved_model_cli show --dir .
The given SavedModel contains the following tag-sets:
The saved_model.pb file is in this directory, and Netron is too unwieldy - given the size of the model it barely opens - so it's difficult to inspect. The model can be opened for inference: detector = hub.load(module_url).signatures['default'] so perhaps I can show the model summary from the detector object (?).
Any ideas how I can determine the model structure?
Any insight into the practicality of converting this model to TFLITE and then compiling for the TPU would be appreciated.
I am aiming to inference tensorflow slim model with Intel OpenVINO optimizer. Using open vino docs and slides for inference and tf slim docs for training model.
It's a multi-class classification problem. I have trained tf slim mobilnet_v2 model from scratch (using sript train_image_classifier.py). Evaluation of trained model on test set gives relatively good results to begin with (using script eval_image_classifier.py):
eval/Accuracy[0.8017]eval/Recall_5[0.9993]
However, single .ckpt file is not saved (even though at the end of train_image_classifier.py run there is a message like "model.ckpt is saved to checkpoint_dir"), there are 3 files (.ckpt-180000.data-00000-of-00001, .ckpt-180000.index, .ckpt-180000.meta) instead.
OpenVINO model optimizer requires a single checkpoint file.
According to docs I call mo_tf.py with following params:
python mo_tf.py --input_model D:/model/mobilenet_v2_224.pb --input_checkpoint D:/model/model.ckpt-180000 -b 1
It gives the error (same if pass --input_checkpoint D:/model/model.ckpt):
[ ERROR ] The value for command line parameter "input_checkpoint" must be existing file/directory, but "D:/model/model.ckpt-180000" does not exist.
Error message is clear, there are not such files on disk. But as I know most tf utilities convert .ckpt-????.meta to .ckpt under the hood.
Trying to call:
python mo_tf.py --input_model D:/model/mobilenet_v2_224.pb --input_meta_graph D:/model/model.ckpt-180000.meta -b 1
Causes:
[ ERROR ] Unknown configuration of input model parameters
It doesn't matter for me in which way I will transfer graph to OpenVINO intermediate representation, just need to reach that result.
Thanks a lot.
EDIT
I managed to run OpenVINO model optimizer on frozen graph of tf slim model. However I still have no idea why had my previous attempts (based on docs) failed.
you can try converting the model to frozen format (.pb) and then convert the model using OpenVINO.
.ckpt-meta has the metagraph. The computation graph structure without variable values.
the one you can observe in tensorboard.
.ckpt-data has the variable values,without the skeleton or structure. to restore a model we need both meta and data files.
.pb file saves the whole graph (meta+data)
As per the documentation of OpenVINO:
When a network is defined in Python* code, you have to create an inference graph file. Usually, graphs are built in a form that allows model training. That means that all trainable parameters are represented as variables in the graph. To use the graph with the Model Optimizer, it should be frozen.
https://software.intel.com/en-us/articles/OpenVINO-Using-TensorFlow
the OpenVINO optimizes the model by converting the weighted graph passed in frozen form.
I have a model trained with tf.estimator and it was exported after training as below
serving_input_fn = tf.estimator.export.build_raw_serving_input_receiver_fn(
feature_placeholders)
classifier.export_savedmodel(
r'./path/to/model/trainedModel', serving_input_fn)
This gives me a saved_model.pb and a folder which contains weights as a .data file. I can reload the saved model using
predictor = tf.contrib.predictor.from_saved_model(r'./path/to/model/trainedModel')
I'd like to run this model on android and that requires the model to be in .pb format. How can I freeze this predictor for use on android platform?
I don't deploy to Android, so you might need to customize the steps a bit, but this is how I do this:
Run <tensorflow_root_installation>/python/tools/freeze_graph.py with arguments --input_saved_model_dir=<path_to_the_savedmodel_directory>, --output_node_names=<full_name_of_the_output_node> (you can get the name of the output node from graph.pbtxt, although that's not the most comfortable of ways), --output_graph=frozen_model.pb
(optionally) Run <tensorflow_root_installation>/python/tools/optimize_for_inference.py with adequate arguments. Alternatively you can look up the Graph Transform Tool and selectively apply optimizations.
At the end of step 1 you'll already have a frozen model with no variables left, that you can then deploy to Android.
TensorFlow Object Detection API
Using the TensorFlow Object Detection API to retrain MobileNet on my own DataSet. The issue occurs as I try to run my inference graph that has been both frozen and quantized.
System:
Ubuntu 16.04,
TensorFlow 1.2 (from source, CPU only),
Bazel 0.4.5
Issue:
Use provided frozen_graph.pb from model zoo.
Quantize to 8-bit using
bazel-bin/tensorflow/tools/graph_transforms/transform_graph.
Run inference
This works, however,
Re-train and produce my own frozen_graph.pb using object_detection/export_inference_graph.py
Quantize to 8-bit using bazel-bin/tensorflow/tools/graph_transforms/transform_graph
Run inference <-- Produces error
Does NOT work, and the error I'm getting during the attempt to run the graph is:
File
"/home/unibap/TensorFlow/tensorflow-python2-sse4.2/local/lib/python2.7/site-packages/tensorflow/python/client/session.py",
line 1298, in _do_call
raise type(e)(node_def, op, message) tensorflow.python.framework.errors_impl.InvalidArgumentError: The node
'Preprocessor/map/while/ResizeImage/ResizeBilinear/eightbit' has
inputs from different frames. The input
'Preprocessor/map/while/ResizeImage/size' is in frame
'Preprocessor/map/while/Preprocessor/map/while/'. The input
'Preprocessor/map/while/ResizeImage/ResizeBilinear_eightbit/Preprocessor/map/while/ResizeImage/ExpandDims/quantize'
is in frame ''.
Since I can quantize and run the provided frozen_graph.pb the issue has to be with the export tool? Which export tool was used to create the frozen_graph.pb that are in the model zoo? Or how was the export tool called?
PS:
Quote from comments in export_inference_graph.pb, assuring me that it should produce a frozen graph if checkpoint is provided.
"Optionally, one can freeze the graph by converting the weights in the provided
checkpoint as graph constants thereby eliminating the need to use a checkpoint
file during inference."
Best